Southern Pacific Transfer Steamer Solano at Port Costa, Calif. Published by The Gray News Co., Salt Lake City, Utah. Made in U.S.A. A-7900
Post marked San Francisco, Calif. May 23, 1915. Addressed to Mr. Lee Weaver, 92 Tireman Av., Detroit, Mich.
“San Francisco, Cal 5/22/15 Dear Cousin – Am enjoying the sights at the exposition, had a fine trip out here. Stopped off in Denver and Salt Lake, also Colorado Springs. Do you think you will make the trip. You know you spoke about it last Winter. California is a beautiful place. I know you would like it. I have a 90 day ticket and think I will stay the limit. Your cousin, Chester Weaver [Chester Louis Weaver, the son of Charles Louis Weaver, brother of Lemuel Weaver, Lee’s father]. General Delivery, San Francisco, Cal.”
From wikipedia: “The Panama–Pacific International Exposition (PPIE) was a world’s fair held in San Francisco, in the United States, between February 20 and December 4 in 1915. Its ostensible purpose was to celebrate the completion of the Panama Canal, but it was widely seen in the city as an opportunity to showcase its recovery from the 1906 earthquake. The fair was constructed on a 635 acre (2.6 km2) site in San Francisco, along the northern shore, between the Presidio and Fort Mason, now known as the Marina District.”
Apparently, the use of General Delivery was Chester’s way of telling Grandpa to write back during the intended 90 day stay in California.